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Journal of Electronic Imaging

Visual saliency-based fast intracoding algorithm for high efficiency video coding
Author(s): Xin Zhou; Guangming Shi; Zhemin Duan
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Paper Abstract

Intraprediction has been significantly improved in high efficiency video coding over H.264/AVC with quad-tree-based coding unit (CU) structure from size 64 × 64 to 8 × 8 and more prediction modes. However, these techniques cause a dramatic increase in computational complexity. An intracoding algorithm is proposed that consists of perceptual fast CU size decision algorithm and fast intraprediction mode decision algorithm. First, based on the visual saliency detection, an adaptive and fast CU size decision method is proposed to alleviate intraencoding complexity. Furthermore, a fast intraprediction mode decision algorithm with step halving rough mode decision method and early modes pruning algorithm is presented to selectively check the potential modes and effectively reduce the complexity of computation. Experimental results show that our proposed fast method reduces the computational complexity of the current HM to about 57% in encoding time with only 0.37% increases in BD rate. Meanwhile, the proposed fast algorithm has reasonable peak signal-to-noise ratio losses and nearly the same subjective perceptual quality.

Paper Details

Date Published: 22 February 2017
PDF: 11 pages
J. Electron. Imag. 26(1) 013019 doi: 10.1117/1.JEI.26.1.013019
Published in: Journal of Electronic Imaging Volume 26, Issue 1
Show Author Affiliations
Xin Zhou, Northwestern Polytechnical Univ. (China)
Guangming Shi, Xidian Univ. (China)
Zhemin Duan, Northwestern Polytechnical Univ. (China)

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